Valve-seating tool



May 15, 1923.

G. J. S. COLLINS VALVE- SEATING TOOL Filed Aug. '25. 1921 J6. 0&////'7s:

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awe-Luau teases GEORGE J. S. COLLINS, OF ST. LOUIS, MISSOURI.

VALVE-SEATING TOOL.

. Application filed August 25, 1921. SeriaLNo. 495,238.

To all 207mm it may concern:

Pieit'known that I, Grouse J. S. Coraline, citizen of the United States. residing at St. Louis, in the county of St. Louis and State of Missouri, have invented certain new and useful Improvements in Valve-Seating Tools, of which the following is a specification.

This invention relates to valve seating tools, and belongs tothat class of implements. or appliances intended to be used to face the valve seats of a gasoline motor, either before the motor is placed in the vehicle originally, or after it has been regularly installed. The valve seats are seldom perfectly true in a new motor, and implements of the character of this invention are designed. to cut the seats accurately, in order that the angle ofthe valve head and the corresponding angle of the valve seat may fit.

perfectly when placed together.

The object of this invention is the pro duction of a hand tool device comprising parts of special construction and arrangement whereby it is believedthe valve seats may be accurately cut, and whereby an especially strong, easily operated and effective instrument is made, the proper use of which does not depend upon the skill and ability of the mechanic'to hold the tool in exact alignment, but is held and revolves accurately by reason of the particular structure disclosed herein.

To illustrate the special construction and arrangement of the Various parts of this invention, the accompanying drawings are made a part of this application. Fig. 1

represents a vertical sectional view of the upper portion of a motor casing or cylinder block, showing this invention, also drawn in vertical section. applied to the valve seat of the casing. the lower portion of the revoluble body or cutter holder, and the stationary rod, the

section being taken on the broken line 22 of Fig. 1. is a top view of the dial nut and stationary rod, showing the dial on the nut and indicating mark on the head of the rod. Fig. & is a top plan view of the body or holder, the dial nut being removed to 8X hibit the washer lying beneath it and the engagement of the washer and the upper longitudinal slot in the rod.

Throughout the drawings and description, the same letter is employed to refer to the Same part.

Fig. 2 is a cross-section of Considering the drawings, the cylinder block or casting Aof a motor has the cusface constituting the valve seat, the cutter B is provided, which has a central tapering passage (3 ground to tightly fitthe tapering end 0 of the body or tool holder"C. The body C is ordinarily I tended sides are given suitable threaded sockets for handlesE and e. by which the revoluble body is turned upon the central and stationary rod F. The body C and cutter are fed lengthwise of the rodby. a thumbnut G engaging the upper. threaded end of the rod, and the nut will be again mentioned.

The rod F on its lower end carriesthe cylindric al member H, having the sharpened edge it arranged to bite the end of a valve stem guide forming a part of the casting A .as illustrated in Fig. *1, andanutJQengaging the threaded end 7' of the rodF, acts as a keeper and prevents the. membe H from being forced off the rod F in operation. As shown in Fig. l the lower end of the rod F hasa longitudinal slot 'K', and a shaped andthe e pin 70 passes througlrthe wall ofthebiting has also a slot L'running lengthwise of the rod. and awasher-lvl, lying upon the upper lini'sliecl surface 9 of the body .or hold er C,

has a lug m engaging the slot L; The purpose of the introduction of the washer and its engagement with the rodF, isto'preve'nt' the turning of the rod by therotary movement given the thumbnut G whenfeeding the cutter, and to preventTt-he loosening of, the thumbnut'after adjustment when the body C is revolved to operate the cutter.

As illustrated in Fig. 8, theupper surface of the thumbnut G has a dial N inscribed thereon, and the head of the 'rod F .is provided with an indicating mark or pointer n. In Fig. 1, the extended sides of the holder or body C are designated by the reference letter D, and the threaded sockets for handles E and e are marked d.

In the operation of this invention, the rod F is. passed throughthe valve stem guide of the cylinder block A, and the biting member H is slipped on the lower end of the rod and held there by the nut J. The holder or bodjg C being placed on the rod with the cutter in the valve seat a, the thumbnu't Gr is applied; and as the cutter is forced against.

the valve seat the rod F is equally drawn upon and the edge h of the member H caused to bite the endof the valve stem guide holding therod F stationary. To feed the cutter y the thumbnutG is turned, and the amount of feed is indicated upon the dial N. The p lower portion of the rod F fits the valve stem guide accurately, and it also fits accurately the passage or bore extending lengthwise through the body C, thus centering the cutter perfectly and keeping it in position. As illustrated the bodyC is bored out axially and made an exact although movable v The cutter is intended to be made of the sion arises.

fit for the rod F, and the body is: revolved around the rod as an axis, the rod being stationary, thus insuring a very accurate cutting of the'valve seat, the amount of which ismeasured by inspecting the dial'with respect to the indicating mark upon the rod.

tering or other vibrations, and by reason ofthe special construction herein described,

this invention may be successfully used even by inexperienced persons.

' Having now descrlbed this inventlon and explained the mode of its operation, what I claim is e a p 1. In a valve seating tool, the combination with a rod, of a body revoluble and adjustable upon the rod and'provided with a cutter, and aimember secured to the lower end of the-rod againstvrotary movement on the rod, the said memberhaving a sharpened portion for biting into the end of a valve stem guide or the like to hold the said rod against rotation. 4 v t 2. In a valve seating tool, the combination with a stationary rod having a threaded lower end and a longitudinal slot in its to feed the'cutter.

lower end, of a removable membermovable lengthwise on the rod and having a pro ection engagingthe said slot, the upper part of the saidrnemberj having'a sharpedge for bitingthe end of a' valve stem guide or the like to hold thesa-id rod stationary,a nutengaging. the'lower'an'd threaded end of the rod to ,keep the said ,member upon the rod, a revoluble'body' provided with a cutter and movable le1'igthwiseonftherod, and means for forcibly moving-t1 3. Ina valve seating tool, the combination with a stationary rod, ofa member moun'ted upon the lower" end of the rod and having a sharpened edg'eu for bitingthe end of a valve stem g'uideor the like to hold the, rod

stationary, means'ffor keeping the member upon the. rod, a'j revolubl'e 1 body movable lengthwise onth'e rod and provided With'a cutter,and means" for forcibly moving the body on the'lr'odtofieed the cutter.

along the rod 4. In a valve jseatingjtool, the combination with a'station'ary' rod, of a member mounted upon the lower end, of the rod and having a sharpened projectingf'portion for biting the end of the valve'stem guide or the like to hold the rod stationary, a revoluble body movable lengthwise of the *rod ia'nd' provided with a cutter, the-upper end-'ofthe said rod being threaded, a th-u'mbpn threaded end the rod for. forcibly moving the body lengthwise of the rod to feed the cutter, anindicating marki on the rod, and a dial carried by the thumb nut'and ar- -,v."engaging ;the said;

ranged in*conjunction -with the said indi-f eating markto measure the'moveme'nt of the body and ie edof the cutter;

5.'Ina valveseating tool, the combination with a stationaryrod', of means borne by the lower 'end'jo f the: rodand having a sharpened projecting portion .forbiting'the end of 'a-valve stemgui'de or the' like to hold the rod stationary, 'a revoluble body pro-,

vided with a cutter and movable lengthwise on the rod, I means for. forcibly, moving the body along the 'rod to feed'the cutter, and indicating d'evicesfcarried the said rod and the said" bodymoving means for indicatin theinovement of the said'body and feed 3f the teeter.

ture.

in anon-GE JL COLLINS. j

Intestimony whereof-II afiix my signa- 

